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Performance Monitoring: Evaluating an Organic Carbon-Limestone PRB for Treatment of Heavy Metals and Acidity
Ludwig, R., Richard T. Wilkin, Steve Acree, R. Ross, AND K. Higgins-Coltrain. Performance Monitoring: Evaluating an Organic Carbon-Limestone PRB for Treatment of Heavy Metals and Acidity. IN: Technology News & Trends, U.S. EPA Office of Superfund Remediation and Technology Innovation, Washington, DC, (60):5-7, (2012).
Newsletter article for the August 2012 Edition of Technology News & Trends.
Since 2004, researchers from the U.S. EPA National Risk Management Research Laboratory (NRMRL) have annually evaluated performance of an organic carbon-limestone permeable reactive barrier (PRB) system installed in 2003 by EPA Region 6 at the Delatte Metals Superfund site in Ponchatoula, Louisiana. Based on early results from testing of two pilot-scale PRBs, a full-scale PRB was installed adjacent to the pilot PRBs to fully intercept and treat a low-pH, heavy metal groundwater plume prior to entry into nearby surface water. As constructed, the full-scale PRB contained approximately 67% composted cow manure and 33% limestone and measured 1.8 meters wide, 4-5 meters deep, and over 300 meters long. The most recent (2011) round of hydrologic and chemical data shows sustained effective treatment of the target contaminant plume by the collective PRB system (two pilot-scale PRBs plus one full-scale PRB), but also shows signs of possible depletion of the reactive media in one of the former pilot-scale PRBs.
URLs/Downloads:Perform Monitor: Eval Org Carb-Limestone PRB Trtmt Hvy Met Acid Exit
ORD-001642 ABSTRACT LUDWIG_RALPH.PDF (PDF,NA pp, 4.875 KB, about PDF)
Record Details:Record Type: DOCUMENT (NEWSLETTER ARTICLE)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL RISK MANAGEMENT RESEARCH LABORATORY
GROUND WATER AND ECOSYSTEMS RESTORATION DIVISION
APPLIED RESEARCH & TECHNICAL SUPPORT BRANCH